<template>
  <div>
    <!--    面包屑-->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>角色管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <el-card>
      <el-row>
        <el-col>
          <el-button type="primary">添加角色</el-button>
        </el-col>
      </el-row>

      <el-table :data="rolelist" style="width: 100%" border stripe>
        <el-table-column type="expand">
          <template slot-scope="props">
            <el-row :class="['bdbottom',i1===0? 'bdtop':'','vcenter']" v-for="(item1,i1) in props.row.children"
                    :key="item1.id">
              <!-- 渲染一级权限-->
              <el-col :span="5">
                <el-tag closable @close="removeRightById(props.row,item1.id)">{{item1.authName}}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二三级权限-->
              <el-col :span="19">
                <!--for嵌套渲染二级权限-->
                <el-row :class="[i2===0? '':'bdtop','vcenter']" v-for="(item2,i2) in item1.children" :key="item2.id">
                  <el-col :span="6">
                    <el-tag type="success" closable @close="removeRightById(props.row,item2.id)">{{item2.authName}}
                    </el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag closable @close="removeRightById(props.row,item3.id)" type="warning"
                            v-for="(item3,i3) in item2.children"
                            :key="item3.id">{{item3.authName}}
                    </el-tag>
                  </el-col>

                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <el-table-column type="index"></el-table-column>
        <el-table-column prop="roleName" label="角色名称" width="180"></el-table-column>
        <el-table-column prop="roleDesc" label="角色描述"></el-table-column>
        <el-table-column
          label="操作" width="300px">
          <template slot-scope="scope">
            <el-button size="mini" type="primary" icon="el-icon-edit">编辑</el-button>
            <el-button size="mini" type="danger" icon="el-icon-delete">删除</el-button>
            <el-button size="mini" type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限
            </el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>

    <el-dialog
      title="分配权限"
      :visible.sync="setRightDialogVisible"
      width="50%" @close="setRightDialogClosed">
      <!--      树形控件-->
      <el-tree :data="rightslist" :props="treeProps" show-checkbox node-key="id" default-expand-all
               :default-checked-keys="defKeys" ref="treeRef"></el-tree>
      <span slot="footer" class="dialog-footer">
    <el-button @click="setRightDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="allotRights">确 定</el-button>
  </span>
    </el-dialog>
  </div>
</template>

<script>
  export default {
    name: 'Roles',
    data() {
      return {
        // 当前即将分配权限的角色id
        roleId: '',
        defKeys: [],
        // 所有角色列表数据
        rolelist: [],
        // 控制分配权限对话框的显示与隐藏
        setRightDialogVisible: false,
        // 所有权限的数据
        rightslist: [],
        treeProps: {
          label: 'authName',
          children: 'children'
        }
      }
    },
    created() {
      this.getRolesList()
    },
    methods: {
      async allotRights() {
        const keys = [...this.$refs.treeRef.getCheckedKeys(), ...this.$refs.treeRef.getHalfCheckedKeys()]
        const idStr = keys.join(',')
        const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`,
          { rids: idStr })
        console.log(res)
        if (res.meta.status !== 200) {
          return this.$message.error('分配权限数据失败！')
        }

        this.getRolesList()
        this.setRightDialogVisible = false
        return this.$message.success('分配权限数据成功！')
      },
      // 监听分配权限对话框的关闭事件
      setRightDialogClosed() {
        this.defKeys = []
      },
      // 递归获得三级权限
      getLefKeys(node, arr) {
        if (!node.children) {
          return arr.push(node.id)
        }

        node.children.forEach(item => {
          this.getLefKeys(item, arr)
        })
      },
      //展示分配权限对话框
      async showSetRightDialog(role) {
        // 当前即将分配权限的角色id
        this.roleId = role.id
        const { data: res } = await this.$http.get('rights/tree')
        if (res.meta.status !== 200) {
          return this.$message.error('获取权限数据失败！')
        }
        // 把获取到的权限数据保存到 data 中
        this.rightslist = res.data
        console.log(this.rightslist)
        this.getLefKeys(role, this.defKeys)
        this.setRightDialogVisible = true
      },
      // 根据Id删除对应的权限
      removeRightById(role, rightId) {
        this.$confirm('此操作将永久删除该权限, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).then(async () => {
          const { data: res } = await this.$http.delete(
            `roles/${role.id}/rights/${rightId}`
          )

          if (res.meta.status !== 200) {
            return this.$message.error('删除失败')
          }

          role.children = res.data
          return this.$message.success('删除成功')
        }).catch(() => {
          this.$message({
            type: 'info',
            message: '已取消删除'
          })
        })
      },
      // 获取所有角色的列表
      async getRolesList() {
        const { data: res } = await this.$http.get('roles')
        if (res.meta.status !== 200) {
          return this.$message.error('获取角色列表失败！')
        }
        this.rolelist = res.data
        console.log(this.rolelist)
      }
    }
  }


</script>

<style scoped>
  .el-tag {
    margin: 7px;
  }

  .bdtop {
    border-top: 1px solid #eee;
  }

  .bdbottom {
    border-bottom: 1px solid #eee;
  }

  .vcenter {
    display: flex;
    align-items: center;
  }
</style>
